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An estimated 5,000 Muslims gathered in Surrey this weekend to pledge loyalty to Britain in light of concerns over the popularity of the extremist militant group Islamic State in Iraq and Syria (Isis), and the alleged involvement of Britons.

The three-day residential event, organised by the Ahmadiyya Muslim Youth Association (Amya), has brought together 5,000 young British Muslim men from England, Scotland and Wales, to foster bonds of brotherhood and affirm their pride in being British and Muslim.

The Caliph, His Holiness Hazrat Mirza Masroor Ahmad, spiritual leader to tens of millions of Muslims across the world, said: "Britain has provided a home for people from across the world. As Ahmadi Muslims, we give thanks to Queen and country for allowing us to practise our faith freely.

The 42nd Ahmadiyyah Muslim Youth Association festival is underway at Farnham in Surrey. Muslim men and boys from the age of 7 up come together for three days of talks, speaking competitions and sport. Those attending also hold a flag hoisting ceremony where they pledge allegiance to Great Britain.

This year, the Caliph of Islam, His Holiness Hazrat Mirza Masroor Ahmad, spiritual leader to tens of millions of Muslims across the world, will be in attendance. Hannah Costigan has been to the convention to meet organisers and attendees.